Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 17, Issue 8
Displaying 1-6 of 6 articles from this issue
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  • Internal Friction Factors of Powder by Constant Volume Shear Test
    Keijiro TERASHITA, Kei MIYANAMI, Takeo YANO, Yoshiyuki YAMAMOTO
    1980 Volume 17 Issue 8 Pages 427-434
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.427
    JOURNAL FREE ACCESS
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    A new type of constant volume shear tester has been developed to obtain the yied loci by a single experimental run. By utilizing this tester, the shear stress which is converted in to the internal friction factor was measured for the several kinds of powders.
    The tester was attatched with the sensors detecting the normal stress distribution (6points) above and below the shearing plane.
    The internal friction factor obtained using constant volume shear tester was compared with that by a constant vertical stress tester.
    The findings are as follows:
    (1) Whether the type of tester is constant volume of constant vertical stress does not affect the normal stress distribution, but it depends on the sorts of powder.
    (2) The shearing stress τx measured by the constant volume tester agrees with the peak shearing stress τx, max observed by tha vertical constant stress tester for coarse powders. For fine powders, the τx coincides with the steady state shearing streess provided by the constant stress tester.
    (3) Both types of the testers make significant difference in the internal friction factors calculated by the normal stress acting on the shear plane.
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  • The Discharge-Rate of Solids-Particles through Orifices with Counter-Current Flow of Water in Solids-Liquid Systems
    Nobuetsu YUTANI, Naoshi OTOTAKE, Shigefumi FUJITA
    1980 Volume 17 Issue 8 Pages 434-441
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.434
    JOURNAL FREE ACCESS
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    The purpose of the present study is to account for the mechnics of the discharge of particles through orifices in water. That is, discharge phenomena of particles with counter-current flow of water are taken into some considerations as model.
    Under the assumption of the formation of “dispersed phase” controlling the discharge rate near orifices, new model have been proposed to explain in terms of the discharge rate using particles velocity distributiou function.
    Theoretical results are in good agreement with experimental data containing other investigators within the experimental range discussed in this study,
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  • [title in Japanese]
    Kenji Hashimoto
    1980 Volume 17 Issue 8 Pages 442-449
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.442
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Michitaka Suzuki, Kazutaka Makino, Koichi Iinoya
    1980 Volume 17 Issue 8 Pages 450-462
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.450
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Ken-ichi Ushiki
    1980 Volume 17 Issue 8 Pages 463-465
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.463
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1980 Volume 17 Issue 8 Pages 466-474
    Published: August 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.466
    JOURNAL FREE ACCESS
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